StringKeyObjectValueIgnoreCaseMultivaluedMap.java

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package com.sun.jersey.core.util;

import java.util.ArrayList;
import java.util.List;
import javax.ws.rs.core.MultivaluedMap;

/**
 * An implementation of {@link MultivaluedMap} where keys are instances of
 * String and are compared ignoring case and values are instances of Object.
 *
 * @author Paul.Sandoz@Sun.Com
 */
public class StringKeyObjectValueIgnoreCaseMultivaluedMap
        extends StringKeyIgnoreCaseMultivaluedMap<Object> {
        
    public StringKeyObjectValueIgnoreCaseMultivaluedMap() {
        super();
    }

    public StringKeyObjectValueIgnoreCaseMultivaluedMap(StringKeyObjectValueIgnoreCaseMultivaluedMap that) {
        super(that);
    }

    @SuppressWarnings("unchecked")
    public <A> List<A> get(String key, Class<A> type) {
        ArrayList<A> l = null;
        List<Object> values = get(key);
        if (values != null) {
            l = new ArrayList<A>();
            for (Object value : values) {
                if (type.isInstance(value)) {
                    l.add((A)value);
                } else {
                    throw new IllegalArgumentException(type + " is not an instance of " + value.getClass());
                }
            }
        }
        return l;
    }

    @SuppressWarnings("unchecked")
    public <A> A getFirst(String key, Class<A> type) {
        Object value = getFirst(key);
        if (value == null)
            return null;

        if (type.isInstance(value)) {
            return (A)value;
        } else {
            throw new IllegalArgumentException(type + " is not an instance of " + value.getClass());
        }
    }

    @SuppressWarnings("unchecked")
    public <A> A getFirst(String key, A defaultValue) {
        Object value = getFirst(key);
        if (value == null)
            return defaultValue;

        if (defaultValue.getClass().isInstance(value)) {
            return (A)value;
        } else {
            throw new IllegalArgumentException(defaultValue.getClass() + " is not an instance of " + value.getClass());
        }
    }
}